Fully migrate to use AndroidX

[Goooler]

Fully migrate to AndroidX, instead of using something like android.app.Fragment, if so we can remove android.enableJetifier=true flags in the projects that depend on this lib.

See https://developer.android.com/jetpack/androidx/migrate

Caution: As of late 2021, most of the library ecosystem already supports AndroidX natively. This means that your project is most likely already using AndroidX libraries directly and there is no need to follow the steps in this migration guide. Additionally, the enableJetifier flag mentioned in this guide can lead to slower build times and should not be used unless it’s necessary.